pencil and story: Barry Windsor-Smith

The protagonist of the story, Adastra, is clearly inspired by the Marvel character Tempesta, aka Ororo Monroe.
Princess Adastra returns to Africa, to a village she had helped years earlier.
She uses her powers to make the land fertile again, thanks also to the help of the spirit of the old tribal chief.
The sacrifice of one of the three village councilors will be needed to make the transformation of the environment permanent.
Windsor-Smith's unmistakable style makes this story a rare pearl of style.
I don't have confirmation, but I believe it is a work rejected by Marvel, perhaps fearful of the topic discussed on the conditions of the African village, exploited without respect by white men.